Pulverizing machine



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H. H. MCNAUGHTON PULVERIZ ING MACHINE Filed Feb. l, 1922 '7 Sheets-Sheet 4 @moan/toa H. H. MCNAUGHTON PULVERIZING MACHINE 7 Sheets-Sheet 5 Filed Feb. l. 1922 ,fw/M4 We www AWM 'N H. H. MCNAUGIHTON PULVERIZING MACHINE Filed Feb. 1.

1922 Y '7 Sheets-Sheet 6 ct., 9 H923.

H. H. MCNAUGHTON PULVERI ZING MACHINE Filed Feb. l. 1922 'T Sheets-Sheet 7 Patented @et 9, 1923.

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lHART n. Mannieiron, or iansyvrriin, rnnnnssnn.

Application filed February 1, 19242. Serial No. 533,361.

To @ZZ 1li/om t may concern.' Be it known that l, HART' H. MCNAUG TON, a citizen of theVnited lStates, residingV at Maryville, in tlie county or' Blount and State or' Tennessee, have inventeda newiand useful Improvement inr Pulverizingf Machines, oi which "the 'following is a specification, reference being had to the accompanydrawing. My. improvement relates particularlyv toV such kmachines as are used for pulveriznggrock means ol centrifugal hammers 'forni ing' parts oi a rotarystructure.`

.lhe object ot the invention is to produceva machine ina orm which will permit the use` ol2 strong` parts cast in complete or so nearly complete ttorm as to require only a limited amount ot machining. A further object o'i the invention is to produce a machine in a compact 'form which tends'toward safety in operation and durability oi parts which are subject to deterioration and which `permits easy interchange ot part-s.

ln the accompanying' drawings,

Fig. l is an elevation of a machine emf bodyingmy improvement, the view being parallel io the axis of the machine;

Fin'. `2 is a plan ol:l the same machine;

F is anV elevation ot the saine machine, lookingA toward the left as shown in Fig. l;

Fie. lis an upright section on the line,- el.-l, of Figs. l, 2, and 7, looking' in the direction of the arrow; l

Fig. 5 is an upright section, of the body of the machine, on the` line5-5, of Fig. 2, looking` in the direction of the arrow;

F 6 is a similar upright section on the line. 6 6, ot Fig; 2, looking' in the direction oli the arrow; V i

7, is an upright section on the line, TMT. ol? Fig. 4L, looking' toward theleft;

Fie'. 8 is a horizontal section` on the line, tl-i, of Figs. 1 and 7, the rotaryT structure heine omitted; f

Fig. 9 a section on the line, 9 l'ipv T, looking toward the. right;

Fig. .l iis a `section on the line, lO-lO, of Fia'. 7, lookingr in the direction of thefarrow; i n

Figa llis a section on the line, ll-ll, of

,'.iox 7, looking in the direction of the arrow; Y l2 is a section on theline, 12-12, ot'

Fig T` looking in the direction of the arrow.;

Fig'. .13 is a section on the line, 12u-13, of

F `,T,`lookinein thedirection ofthe arrow;

Fig. 14 is an uprightfsection on the line Melel, of Figu i', looking toward the left;

Fig. l is a horizontal section on the line, l5-l5, of Figf, V Fig. 1.6 is va 'section onthe line, 16416, of llipl. 7, lookn'gin the direction el thev arrow;

rigs. l and 18 aredetail views of thev grating; trame; f '1 llggl). is a `detail View oi' the key block used Yi'or holding` the grating` trame;

Fig. 2() is a perspective of one ot' the screen bar spacing,` keys;

Fig. 2l is a perspective of one of the liningplates used in the leit hand part of the machine; f y' Fig". 22 shows another means for securing the ,grinding plates;

Fig'. 23 is a section on the line, 23-23, of Fig. 22.

lT he body of the machine is of boxy form comprising' -tour upright walls which` are substantially rectangular, and said body is For convenience in description, the side of the machine shown in Fig. l will beregarded asthe front ot' the machine. f

The tront wall, A, and the rear wall, B, are alike in reverse. @is thevleft hand end wall and D is the right hand end wall.

rThe front wall, A, has acircular opening, A1, rand the rear wall, B, has a circular opening, B1. The centers of said 'openings are on the same horizontal axial lineand are or' the same diameter. Around'tlie opening,

A1, and on the exterior of the wall, A, is a machined face, A2, around which is a ring# form rib, A3. A ring-form plate, At, rests against said machined tace and is secured to the wall, A., by means of bolts or cap screws, 15. On the lower part of said ringis a bracket, A, reaching outward horizon tally away from the plate, A4, and then ex tendingv ujiward.` The upper part of said bracket forms the lower halt, A?, lof a bearing to receive a bearing sleeve, A8. A bearinl;Y cap, A, extends across the upper part ot the sleeve, A8, and is secured to the member, A7. `At the rear oi' the machine, a face, B2,

. is similarlymachined alone' the circumference of the opening, B1, and a ringfformrib, B3, is formed on the wall, B, around said race. A ring-form plate, B", is applied to said llace and secured by bolts or cap screws, P15. Said ring-form plate has a bracket, B65. the rear pari ot which is extended upward and forms the lower part, B7, of al bearing llll for the bearingsleeve, B2.- A bearing cap,

B2, extends across the upper partofthe bearing sleeve and is secured to the lower bellngmember, B7.. Y l Y A flange,V C1, extends horizontally Valong the inner face of the wall, C, near the upper edge of said wall. At the same level, a

similarflange, A10, extends from the flange,4

C1, toward the right along the innerface extendsalong the inner face 'ofthe wall, A,

frein the Vrright hand end of the flange, A10,

downward tothe'w'all, C, on'aV curve which hasits center' a little way above'the axis of the opening, 'A1, in the `wall,`A.` A Vsimilar flange, A12, extends inward fromV the innerface Jofthe wall, A, along the upper halll` of said opening, `A1,'and a short distance below thje horizontal middle line of said opening. Along'the lower edge of the wall,-A,is lan''inwardfdirected flange, A13. @n the" inner face of the wall, B, are flanges B10, B11, B12 and B13, directly opposite and corresponding to the flanges, A10, A11, A12 and A13, on the wall, A;

In the lower part 'of' the wall, C, is an opening, C2. A door or closure, C3, is applied over the opening, C2, on the outer face of the wall, C, and is secured by cap screws, C4. Along the lower edge of the wall, C, is an inward-directed flange Cf.

'Qn the' lower part ofthe inner face of the wall, D, is a .rib or shoulder, D1, which serves as anabutment and support, as will be describedl further on. Along the lower edge of the wall, D, is an inward-directed flange, D10. The wall, D, extends upward only alittle above the middle of the height of the walls, A and B,and the upper part of saidwall has a flange, D2, extended t0- ward the right, vand the parts of the wall, Av and B, above said flange extend to the right hand limit of said flange.

A horizontal shaft, D3, has its front end seated in the front wall, A, near the upper right hand corner of said wall and has its rear end seated similarly in the right hand upperV Vcorner ofthe rear wail, B. Below said shafta wall, E, extends horizontally across Vthe space between the walls, A and B, and is `ioined to said walls, being preferably cast integral with said walls. The wall, E, is far enough away from the shaft, D3', to maire room for hinging the throat door, D4. T herright hand edge of the wall, E, is expanded to form an inclined face, E1, which is overlapped by a flange, D5, ex-

tendingv obliquely toward the` left and down-V ward on the inner facejof said door. The left hand upper .part ofthe wall, E, is niet by an upright wall, E2, which extends from the walLA, to the wall, B, to form a throat wall.

of the wall, E, adjacent the shaft, D1,

The right handor main wall, D,- of said door 1s curved downward toward the right to kextend the throatrof the inadoor overlaps Vtheright hand edge of theV flange, D2, and'extends' upward on the front and-rear faces of saiddoor A'and overlaps the adjacent uprigl'itY edgesof the walls,

andB. AtV Veach'upper corner said door' hasan ear, D, surrounding the shaft, D1.v Thus saidv door' is supportedjby and made turn? able on said shaft.' The upper part of the outer face of the door and the upper .face "are so curved as to permit the'turning 'of door upward, contra-clockwise, until the greater part fof' said door has passed the upright plane of said shaft and the outer face of the door rests upon the upperl face of the walhE. Said door affords accessrto the adjacent part of the interior of the machine.

The bearing sleeves, LAS and B2, receive the axle, F, of the rotary structure. Said axle is surrounded by a hub', F1, which extends from the bearing sleeve, AS, to the bearing sleeve, B8. T he inner end of each of said bearing sleeves is surrounded by an abutment ring, F2, which abut-sr against the adjacent bearingfAlfA or B1, Bf.v and meets a shoulder, F3, on said hub. By means 'of' said abutment ring, the rotary structure is held against endwise movement.v

Along the joint formed atV the meeting of thebearing sleeves and the hub, the inner faces of' t-he rings, FI2, are provided with channels, F4, in which is packing, F5, which is intended to prevent the escape of o il and the admission of dust into the bearing sleeves. The rear lendV of the bearing sleeve.y B2, and the adjacent end of the axles, F, are covered by a cap, FG, which is suitably secured to the exterior of said sleeve. The function of said cap is to exclude dust and to prevent 'the escape of oil.

Between the rear abutment ring, F2, and the adjacent Ywall of the machine, said hub is thickened to form a pulley, F7, which may receive a belt to be driven by said pulley and connected with a conveyor for carrying the pulverized material away from the machine. At the front of the machine, the axle, F, extends forward through the bearing sleeve, AS, and receives alarger pulley, FS,

which is to receive a driving belt whereby the said pulley and the axle, F, are rotated.

YBetween'theA ring-form plates, A* and B1,

wheels, F9, are formed Von the hub, F1, the'` diameter ofA saidwheels vbeing nearly lthe same as the diameter of the openings, A1-and the walls, Pfand B, said'whe'els' extend into said openings, A1 and B1. Lining plates, l,

to be described further on are applied to the inner faces of the walls, A and B, and are of'suflicient thickness to extend inward as far as the wheels, F9, extend'inward. Thus the walls, A and B, and said lining plates form chambers or recesses occupied by said wheels, so that said wheels are not in the main part of the interior of the machine. The pe'ripheries of each of said wheels is approximately as thick as the thickness of the adjacent wall plus the thicknessof they adjacent lining plate. Between said; peripheries and the hub are horizontal bearings, F1", on lines parallel to the axle, F. Shafts, F11, rest in said bearings and support hammers, F12, said hammers having arms, F11, through which said shaft extends. Saidl arms, F1, are of such length as to allow the body of. the hammer to extend outward away from the axis of the shaft, F, beyond the peripheries of the wheels, F1. Said. hammers are of the well known centri fugal type vand, made of any desired form.

The space between each ring-form pla-tc, A1 and B1, and the hub is closed by a divided ring, F11, each such ring consisting of two halves and having its outer edges overlapping the inner edges of the ring-form plates, ff`i1and B1, and` secured thereto by bolts or screws, F15. At their inner edges the plates, F11, have a channel, F1, in which is packing, F17, the function of which is to prevent the escape of pulverized material from the interior of the machine. K

The four lower fianges, A11, B11, G5 and D10, serve to form a base for the body of the machine and may be' used for attaching the lower part' of a conveyor structure. Furtheri'nore, the flanges, A13 and B1", serve to support blocks, G, which form a seat for the screen frame, H. The right` hand ends of the right end blocks abut against the wall, D. The left hand edges of the blocks, G, abut-against a shoulder, G1, formed on the inner face of the adjacent wall, A, or the adjacentr wall, B. The upper faces of the parts of the flanges on which said blocks rest are inclined away from theadjacent walls. Cap bolts, G1, extend horizontally through said blocks and engage the adjacent upright -wall. By drawing said blocks toward said walls, said blocks are forced upward. The upper edges of said blocks are curved to conform to the curved side members of the screen frame and said members rest on said curvedfaces of said blocks. Hence tightening of said bolts will cause said blocks to press upward against the side members of the screen frame. YThe screen frame, H, is concentric with the axle, F, of the machine. The main parts of the screen; frame are the curvedr side members, H1., and the cross bars,

H1, extending across the spaces between the ,A, and the vrear side member, H1, bears against the inner face of the rear wall, B. The right hand ends of the side members bear against the abutment rib, D1, and against the adjacent rib, A12 or B11, whereby the screen frame is prevented from moving toward the right. Theleft hand ends of the side members, H, bear against the left hand ends` of the ribs, f 11 and B11, whereby leftward movement of the frame .is prevented.

Each side member, H1, of the screen frame has a longitudinal upright chamber, H5, and 1n each inner wall each of said members has a longitudinal slot, H, connecting said chamber with the exterior. The screen bars, H7, extend from one of the members, H1, to the other and have their ends extending through the slots, H, into the chamber, H5. Said bars are flat and are set edgewise and spaced from each other by spacing keys, H11, set upright between the bars in the chambers, H5. The upright dimensions of the bars nearly equal the corresponding dimensions of the slots, H1. For the insertion of the bars and the spacing keys, a slot, H9, is extended downward from the left hand end of the chambers, H5, and from the slot, Hf, to and through ther lower face of the member, H1. For assembling the parts, a bar, H7, is lifted upward through the slots, H11, and then moved rightward in the slots, H6. Then a spacing key, H8, is moved upward through each slot, H9, and moved to the riglitand placed against said bar. Then another bar and other keys, are similarly entereduntil all the bars and keys are in place. Then a retaining block, H10, is put into the slot, H9. and secured by a bolt, H11.

It will beobserved that the bars, H7, and the spacing' keys, H5, are held securely in their places, the bars being` held against movement up and down and also against endwise movement, and the spacing keys being longer than the slots, H1,and therefore restrained from movement out of the chainbers, H5;

The upper faces of the members, H1, are even with the adjacentedges of the walls, A and B, at the openings, A1 and B11 the ribs, A11 and B11, beingabsent along this partof theopenings, A1 and B1.

At, the left ofthe screen frame, an inclined bar, H12 is secured to each wall, A and B, by means oi' bolts, H13, the ends of vthese bars meeting the ends ot the side members of the screen trame. A; keyT block or plate,l H11, extends from the wall, to the wall', B, and has its ends resting on the bars, H12, and also bears against the adjacent ends oit the side members, lil1, ot the screen frame. Said key plate also serves asa lower grindf ing plate, a part el the upper face ofsaid plate being exposed for impact by the nia-A terial which is4 being pulver-ized. YSaideiposed 'face is preferably ribbed or (,:lianneled as shown at, H15.

Keeping in mind that the ends ol the key plate, H11, reach to the innerl t'aces of the wall, A and B, it is next to be noted that a lining plate, l, Ais placed against the inner tace or each wall, A and B, next abov the key plate, H14, and extending 'jroin the openings, i1 or B1, outward to the inner Yface of the adjacent concave grinding plate, J. The inner edge of said lining plate, l, has a channel, l1, to receive the adjacent rib, A12 or B12, (see Fig. el). I, .is secured to the adjacent Wall by means of cap bolts, l2 extending through the wall into said pl` Next above said plate., l, s a simiH openings, A1 or B1, to the adjacent concave grinding plates, J, and said lining plate is, y similarly secured by cap bolts. At the right Y of the last lining plate .is another similar -lining plate similarly secured and at the right of the last mentioned lining plate is another such plate reaching past the right hand edge ot the adjacent grinding plate, J, and riglitivard to the edge of the door, D, and downward to the le-tt'hand grinding plate, J, Below the last lining plate, l, is another lining plate, E3, (see Figs. 7 and 21).

The grinding plates, J, between the key plate, A11, and the throat of `the machine reach :troni the inner face of the wall, A, to the inner tace ot the wall, B. and have their inner faces bearing against the outer edges ot' the lining plates, l. The dimensions oit the said parts are such as to leave a space between the convex outer laces of the grindinto said space, whereby the grindingplates are pressed firmly against the outer edges of the lining plates, l. Another segmentalkey is similarly placed rightivard otthe ribs,

also overlaps the and hears with its Each lining plate, I2, adjacent rib. A12 or B12,

lower endon the rib. D1, la., F, to receive said rib. Arnd the inner face vof each of said. plates, l2, has a channel,

'llhe lining plate,'

Ad has a channel,`

l5, to receive a tongue, J3, formed on the its upper edge Vsaid lining plate, J, has a flange, J1', extended toward the right to overlap the part oi' the vflange, D2, oli theA Wall,

il, which is not covered by the' door, DG.

Lind the lining plate, I3 is also secured by,

'sthere turnedu tace of the adjacent grinding Cap bolts, K1, extend through Vnd the adjacent llanges, A1 or B10.

lid in: y be removed after removing he grinding plates between andthe throat of the e removed after removing the u Then the lining plates 'which sa grinding plates bore may oni-overl after loosening the bolts, l2. The

, irate, J, at the lett ot themachine ie removed after the lining plates im,-

clv above said grinding plate have '.7 been removed, said lett hand grinding i c iiiig platcs; l, may be removed oving` the bolts, l2, from said 'n access to the spaces above the ne l12er'-'cleaning out said spaces, (l2, is removed and then the key is 'drawn riglitward through the opcizing.A Then the attendant may ,ii through the space between the left Ad part oli the screen traine and the lower oilr the left hand grinding plate, J. i or removing the screen frame, the ribs, 12, and the lett hand supporting blocks, Gr, are also removed; Then the left hand part o? the screen Atrame is to be'sliglitly lowered ai' the ribs, A12 and B12, and the frame is then to be drawn lettward through the door opening.r

figs. 22 and Zillustrate anotherv means uriiig the concave grinding plates, J. ln this torni. the flanges, A11 and B11, are omitted from the wall A and B, and lugs, li, are i, accd on said vralls near the outer trees et vthe grindingplates, J, one such lug being opposite each plate on each end wall. VFor each such plate there is awedge bar, li, which has at each end a wedge-shape head, i12., adaptcdto engage by wedge ac-Y tion hein the adj, .cent lug, L.` For releasing the grinding plates, tlieseivedge heads are to be hi the lower ends Vwith. a hammer or simi'- ieinl n the adjacent grindingplate and ig plates land the grate bars lifted outof thev channels, l5.

Mir/oa?? them durable. lt will be desirable to 'ternper both edge faces of the grate bars to nialrc thein hard, while the body is of ordinary teinper and strong. llt both edge faces are thus hardened, the bars may be reversed a'lter one edge has been worn by use.

l claim as niy invention,4

l.. lin a machine ol the kind described, "he combination with a body having upright walls and ak rotary structure supported by said walls and comprisingv centrilfugal ham-e mers, of a screen Jtraine and grate bars below the rotary structure, upright lining;` plates located between the screen ,lranie and the throat ot the machine and having their inner liaces channeled, and a grinding plate having its ends resting in said channels and against the adjacent end oit the screen trarne, substantially as described.

2. ln a machine oit the kind described, the combination et' body having` upright walls and a rotary structure supported'by said walls and comprising centrii'ugal hammers, the walls which support the rotary structure having openings into which the rotary str cture extends and said supponriag,r walls having ontheir inner 'faces a flange concentric to the axis of the rotary structure and bordering said opening, lining,4 plates supported on the inner faces ol? said walls and fitted to said flange, and concave grinding; plates, substantially described.

8. ln a machine of the kind described, the combination with a one-piece cast body having upright walls and a rotary structure Supportaci by said walls and comprising,1 centrifugal hanirners, oi a screen trame and grate bars below the rotary structure, liningl plates on the inner itaces oli the end walls, concave grinding plates having' their ends siuaported by the lining plates, and lzey nienibers engaging the outer faces et "l grinding plates, substantially described.

il. ln machine oit the kind described, the combination with a one-piece cast body liaving' uprightwalls and a rotary structure supported by said walls and ceinprising` centrifugal bananiers, of a screen traine and Lilli and an abutment on the inner tace of oney of the cross walls, an endwise rei'i'iovable screen 'traine in the lower part oi said body and having one end bearing against said abutment and removable ineans bearing against tbe other end of the screen frame, grate bars in said traine and a rotary structure comprising centrifugal hainniers, sub stantially as described.

(l. ln machine of the kind described, the combination with a body having upright wallsuand an abutment on the inner face of one of the cross walls, a screen traine in the lower part oi said body and having one end bearin against said abutment and removable ineans bearing` against the other end oi'i the screen traine,` a reino fable key member at the opposite end of the screen traine, removable supports for said key member, and removable supports under the ser en traine, substantially as described.

Y. ln niachine ot the kind described., the combination with the body of the machine and a. rotary structure supported by the body, ot a screen structure located below the rotary structure and comprising screen bars and spacing keys and side members having; slots to receive the ends ofthe screen bars and said side inernbers being; vchambered larger 'han said slots to receive the key inernbers, and the side members having 

